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Hi Fernando.
Agree - looks like you are down to fine tuning and I would think that you should get good results as is - the optics look good. Additional tweaking should give you worthwhile, but relatively minor, improvements in resolution and contrast.
I get a very similar variation in pattern across an out of focus star image and have concluded that it is due to the adhesive mirror mounting causing minor distortions in the figure - have found it not to be a major problem when in focus in any case. Of course I could be wrong and it might just be thermal currents in the tube.
Really looking forward to seeing some images. Regards Ray
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